Use source position table for crankshaft code.

src/crankshaft/ppc/lithium-codegen-ppc.h

Index: src/crankshaft/ppc/lithium-codegen-ppc.h
diff --git a/src/crankshaft/ppc/lithium-codegen-ppc.h b/src/crankshaft/ppc/lithium-codegen-ppc.h
index 730c4bd6481468bfc6f149c9bd8dbe7eb14a31c2..e76ddf16d4dd2672d777337ed16e9ac7409750b4 100644
--- a/src/crankshaft/ppc/lithium-codegen-ppc.h
+++ b/src/crankshaft/ppc/lithium-codegen-ppc.h
@@ -228,7 +228,7 @@ class LCodeGen : public LCodeGenBase {
   void EmitInteger32MathAbs(LMathAbs* instr);
 #endif
 
-  // Support for recording safepoint and position information.
+  // Support for recording safepoint information.
   void RecordSafepoint(LPointerMap* pointers, Safepoint::Kind kind,
                        int arguments, Safepoint::DeoptMode mode);
   void RecordSafepoint(LPointerMap* pointers, Safepoint::DeoptMode mode);
@@ -236,8 +236,6 @@ class LCodeGen : public LCodeGenBase {
   void RecordSafepointWithRegisters(LPointerMap* pointers, int arguments,
                                     Safepoint::DeoptMode mode);
 
-  void RecordAndWritePosition(int position) override;
-
   static Condition TokenToCondition(Token::Value op);
   void EmitGoto(int block);